Change carrier logo on top of screen?

does anyone know who to change the carrier logo on an ipod touch? im talking about the spot where it normally says "iPod". i already know about Make it mine, but i dont want to change the text, i want to put an actual logo there, like a lamborghini one to match my theme.

I believe i used this last time. If you look at some other WinterBoard themes you could prolly find the right set of folders, instead of actually replacing them. Now that i saw you post this i'm actually tempted to change mine again. I'll let you know how it goes.